1 files changed, 298 insertions, 0 deletions

diff --git a/drivers/usb/misc/emi62.c b/drivers/usb/misc/emi62.c
new file mode 100644
index 000000000000..189986af2ac7
--- /dev/null
+++ b/drivers/usb/misc/emi62.c
@@ -0,0 +1,298 @@
+/* 
+ * Emagic EMI 2|6 usb audio interface firmware loader.
+ * Copyright (C) 2002
+ *      Tapio Laxström (tapio.laxstrom@iptime.fi)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, as published by
+ * the Free Software Foundation, version 2.
+ * 
+ * $Id: emi62.c,v 1.15 2002/04/23 06:13:59 tapio Exp $
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+
+#define MAX_INTEL_HEX_RECORD_LENGTH 16
+typedef struct _INTEL_HEX_RECORD
+{
+        __u32   length;
+        __u32   address;
+        __u32   type;
+        __u8    data[MAX_INTEL_HEX_RECORD_LENGTH];
+} INTEL_HEX_RECORD, *PINTEL_HEX_RECORD;
+
+/* include firmware (variables)*/
+
+/* FIXME: This is quick and dirty solution! */
+#define SPDIF   /* if you want SPDIF comment next line */
+//#undef SPDIF  /* if you want MIDI uncomment this line */ 
+
+#ifdef SPDIF
+#  include "emi62_fw_s.h" /* spdif fw */
+#else
+#  include "emi62_fw_m.h" /* midi fw */
+#endif
+
+#define EMI62_VENDOR_ID                 0x086a  /* Emagic Soft-und Hardware GmBH */
+#define EMI62_PRODUCT_ID                0x0110  /* EMI 6|2m without firmware */
+
+#define ANCHOR_LOAD_INTERNAL    0xA0    /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
+#define ANCHOR_LOAD_EXTERNAL    0xA3    /* This command is not implemented in the core. Requires firmware */
+#define ANCHOR_LOAD_FPGA        0xA5    /* This command is not implemented in the core. Requires firmware. Emagic extension */
+#define MAX_INTERNAL_ADDRESS    0x1B3F  /* This is the highest internal RAM address for the AN2131Q */
+#define CPUCS_REG               0x7F92  /* EZ-USB Control and Status Register.  Bit 0 controls 8051 reset */ 
+#define INTERNAL_RAM(address)   (address <= MAX_INTERNAL_ADDRESS)
+
+static int emi62_writememory( struct usb_device *dev, int address, unsigned char *data, int length, __u8 bRequest);
+static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
+static int emi62_load_firmware (struct usb_device *dev);
+static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id);
+static void emi62_disconnect(struct usb_interface *intf);
+static int __init emi62_init (void);
+static void __exit emi62_exit (void);
+
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi62_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
+{
+        int result;
+        unsigned char *buffer =  kmalloc (length, GFP_KERNEL);
+
+        if (!buffer) {
+                err("emi62: kmalloc(%d) failed.", length);
+                return -ENOMEM;
+        }
+        memcpy (buffer, data, length);
+        /* Note: usb_control_msg returns negative value on error or length of the
+         *               data that was written! */
+        result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
+        kfree (buffer);
+        return result;
+}
+
+/* thanks to drivers/usb/serial/keyspan_pda.c code */
+static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
+{
+        int response;
+        info("%s - %d", __FUNCTION__, reset_bit);
+        
+        response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
+        if (response < 0) {
+                err("emi62: set_reset (%d) failed", reset_bit);
+        }
+        return response;
+}
+
+#define FW_LOAD_SIZE            1023
+
+static int emi62_load_firmware (struct usb_device *dev)
+{
+        int err;
+        int i;
+        int pos = 0;    /* Position in hex record */
+        __u32 addr;     /* Address to write */
+        __u8 *buf;
+
+        dev_dbg(&dev->dev, "load_firmware\n");
+        buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
+        if (!buf) {
+                err( "%s - error loading firmware: error = %d", __FUNCTION__, -ENOMEM);
+                err = -ENOMEM;
+                goto wraperr;
+        }
+
+        /* Assert reset (stop the CPU in the EMI) */
+        err = emi62_set_reset(dev,1);
+        if (err < 0) {
+                err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                goto wraperr;
+        }
+
+        /* 1. We need to put the loader for the FPGA into the EZ-USB */
+        for (i=0; g_emi62_loader[i].type == 0; i++) {
+                err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
+                if (err < 0) {
+                        err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                        goto wraperr;
+                }
+        }
+
+        /* De-assert reset (let the CPU run) */
+        err = emi62_set_reset(dev,0);
+
+        /* 2. We upload the FPGA firmware into the EMI
+         * Note: collect up to 1023 (yes!) bytes and send them with
+         * a single request. This is _much_ faster! */
+        do {
+                i = 0;
+                addr = g_emi62bs[pos].address;
+
+                /* intel hex records are terminated with type 0 element */
+                while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
+                        memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
+                        i += g_emi62bs[pos].length;
+                        pos++;
+                }
+                err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
+                if (err < 0) {
+                        err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                        goto wraperr;
+                }
+        } while (i > 0);
+
+        /* Assert reset (stop the CPU in the EMI) */
+        err = emi62_set_reset(dev,1);
+        if (err < 0) {
+                err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                goto wraperr;
+        }
+
+        /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
+        for (i=0; g_emi62_loader[i].type == 0; i++) {
+                err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
+                if (err < 0) {
+                        err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                        goto wraperr;
+                }
+        }
+
+        /* De-assert reset (let the CPU run) */
+        err = emi62_set_reset(dev,0);
+        if (err < 0) {
+                err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                goto wraperr;
+        }
+
+        /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
+
+/* FIXME: quick and dirty ifdefs */
+#ifdef SPDIF
+        for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
+                if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
+                        err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
+                        if (err < 0) {
+                                err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                                goto wraperr;
+                        }
+                }
+        }
+#else /* MIDI */
+        for (i=0; g_HexMidiFw62[i].type == 0; i++) {
+                if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
+                        err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
+                        if (err < 0) {
+                                err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
+                                goto wraperr;
+                                return err;
+                        }
+                }
+        }
+#endif  
+        /* Assert reset (stop the CPU in the EMI) */
+        err = emi62_set_reset(dev,1);
+        if (err < 0) {
+                err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                goto wraperr;
+        }
+
+/* FIXME: quick and dirty ifdefs */
+#ifdef SPDIF
+        for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
+                if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
+                        err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
+                        if (err < 0) {
+                                err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                                goto wraperr;
+                        }
+                }
+        }
+#else /* MIDI */
+        for (i=0; g_HexMidiFw62[i].type == 0; i++) {
+                if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
+                        err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
+                        if (err < 0) {
+                                err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
+                                goto wraperr;
+                        }
+                }
+        }
+#endif
+        
+        /* De-assert reset (let the CPU run) */
+        err = emi62_set_reset(dev,0);
+        if (err < 0) {
+                err("%s - error loading firmware: error = %d", __FUNCTION__, err);
+                goto wraperr;
+        }
+
+        kfree(buf);
+
+        /* return 1 to fail the driver inialization
+         * and give real driver change to load */
+        return 1;
+
+wraperr:
+        kfree(buf);
+        dev_err(&dev->dev, "Error\n");
+        return err;
+}
+
+static __devinitdata struct usb_device_id id_table [] = {
+        { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
+        { }                                             /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE (usb, id_table);
+
+static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
+{
+        struct usb_device *dev = interface_to_usbdev(intf);
+        dev_dbg(&intf->dev, "emi62_probe\n");
+
+        info("%s start", __FUNCTION__); 
+
+        emi62_load_firmware(dev);
+
+        /* do not return the driver context, let real audio driver do that */
+        return -EIO;
+}
+
+static void emi62_disconnect(struct usb_interface *intf)
+{
+}
+
+static struct usb_driver emi62_driver = {
+        .owner          = THIS_MODULE,
+        .name           = "emi62 - firmware loader",
+        .probe          = emi62_probe,
+        .disconnect     = emi62_disconnect,
+        .id_table       = id_table,
+};
+
+static int __init emi62_init (void)
+{
+        int retval;
+        retval = usb_register (&emi62_driver);
+        if (retval)
+                printk(KERN_ERR "adi-emi: registration failed\n");
+        return retval;
+}
+
+static void __exit emi62_exit (void)
+{
+        usb_deregister (&emi62_driver);
+}
+
+module_init(emi62_init);
+module_exit(emi62_exit);
+
+MODULE_AUTHOR("tapio laxström");
+MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
+MODULE_LICENSE("GPL");
+
+/* vi:ai:syntax=c:sw=8:ts=8:tw=80
+ */